You're misquoting that off-topic reason. It reads:
Questions asking us to recommend or find a tool, library or favorite off-site resource are off-topic for Stack Overflow as they tend to attract opinionated answers and spam. Instead, describe the problem and what has been done so far to solve it.
Note that the word "specific" doesn't appear anywhere - indeed, a big problem with the questions this reason was created to address is that they're not specific, thus opening the door to lazy recommendations and spam. Indeed, the advice linked to is all about being more specific as to the problem being solved.
The question used in this audit isn't asking for folks to recommend their favorite Font Awesome reference - it's just looking for the canonical docs for a specific version of the software, and includes specific details as to where that documentation used to be found and how it's failing now. It seems quite specific.
While that might seem like an odd question to ask, it's more common than you might realize: some companies are, sadly, crap at maintaining stable links to stuff like this.
As such, there's only really one possible answer - thus eliminating the problems of subjectiveness and spam-attraction inherent in "recommendation" questions.